基于动态输出反馈控制的主动队列管理算法  

Active Queue Management Algorithm Based on Dynamic Output Feedback Control

作　　者：葛龙[1,2] 孙金生[1] 王执铨[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094 [2]常熟市科学技术局,江苏常熟215500

出　　处：《电子学报》2010年第12期2816-2821,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60974129;No.70931002);江苏省自然科学基金(No.BK2008188;No.BK2009388)

摘　　要：针对网络拥塞控制的不确定时滞特性,提出了一种基于动态输出反馈控制(DOFC)的主动队列管理(AQM)算法.建立了TCP/AQM系统的时滞有界模型,给出了判定闭环AQM系统稳定的充分性条件,以及基于线性矩阵不等式的动态输出反馈控制器参数设计方法.仿真结果表明,该算法在大时滞的网络环境中,能迅速地将队列长度收敛到目标长度附近,且在特征参数变化的网络环境中具有较强的鲁棒性.Considering the uncertain time-delay characteristic of network congestion control,a novel Active Queue Management（AQM） algorithm based on Dynamic Output Feedback Control（DOFC） is proposed.The model of TCP/AQM is converted into a linear system with bounded time-delay,sufficient condition to judge the stability of the closed-loop system is deduced,and approach to design the parameter of DOFC based on linear matrix inequality is recommended.Simulation results show that the proposed algorithm is able to stabilize the queue length to the target value quickly in condition that network configuration parameters are large delay,and is more robust in dynamic network environment with uncertain characteristic parameters.

关 键 词：网络拥塞控制 主动队列管理 时滞系统 动态输出反馈 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]